RT Journal Article SR Electronic T1 Bath Ankylosing Spondylitis Functional Index Shows Promising Reliability and Validity in the Assessment of Activity Limitations in Axial Spondyloarthritis JF The Journal of Rheumatology JO J Rheumatol FD The Journal of Rheumatology SP 1618 OP 1618 DO 10.3899/jrheum.150439.C1 VO 43 IS 8 YR 2016 UL http://www.jrheum.org/content/43/8/1618.2.abstract AB